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Effects of Si Addition and Long-Term Thermal Exposure on the Tensile Properties of a Ni-Mo-Cr Superalloy
Xu, ZF; Dong, JS; Jiang, L; Li, ZJ; Zhou, XT; Jiang, L (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Thorium Molten Salts Reactor Ctr, Shanghai 201204, Peoples R China.
2015
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume28Issue:8Pages:951—957
Subtype期刊文献
AbstractThe effect of long-term thermal exposure on the grain boundary carbides and the tensile behavior of two kinds of Ni-Mo-Cr superalloys with different silicon contents (0 and 0.46 wt%) was investigated. Experimental results showed granular M2C carbides formed at the grain boundaries after exposure for 100 h for the non-silicon alloy. Furthermore, these fine granular M2C carbides will transform into plate-like M6C carbides as exposure time increases. For the Si-containing alloys, only the granular M6C carbides formed at the grain boundaries during the whole exposure time. The coarsening of the grain boundary carbides occurred in both alloys with increasing exposure time. In addition, the coarsening kinetics of the grain boundary carbides for the non-silicon alloy is faster than that of the standard alloy. The tensile properties of both alloys are improved after exposure for 100 h due to the formation of nano-sized grain boundary carbides. The grain boundary carbides are coarsened more seriously for non-silicon alloys than that of Si-containing alloys, resulting in a more significant decrease in the tensile strength and elongation for the former case. Silicon additions can effectively inhibit the severe coarsening of the grain boundary carbides and thus avoid the obvious deterioration of the tensile properties after a long-term thermal exposure.
KeywordPrecipitation Behavior Mechanical-properties Rupture Properties Hastelloy-n Carbide Steel
Indexed BySCI
Language英语
WOS IDWOS:000360785100001
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24911
Collection中科院上海应用物理研究所2011-2019年
Corresponding AuthorJiang, L (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Thorium Molten Salts Reactor Ctr, Shanghai 201204, Peoples R China.
Recommended Citation
GB/T 7714
Xu, ZF,Dong, JS,Jiang, L,et al. Effects of Si Addition and Long-Term Thermal Exposure on the Tensile Properties of a Ni-Mo-Cr Superalloy[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2015,28(8):951—957.
APA Xu, ZF,Dong, JS,Jiang, L,Li, ZJ,Zhou, XT,&Jiang, L .(2015).Effects of Si Addition and Long-Term Thermal Exposure on the Tensile Properties of a Ni-Mo-Cr Superalloy.ACTA METALLURGICA SINICA-ENGLISH LETTERS,28(8),951—957.
MLA Xu, ZF,et al."Effects of Si Addition and Long-Term Thermal Exposure on the Tensile Properties of a Ni-Mo-Cr Superalloy".ACTA METALLURGICA SINICA-ENGLISH LETTERS 28.8(2015):951—957.
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